에 통달해 있다

Expression

e tongdalhae itda

to be proficient in

être compétent en ; être expert en

Conjugation

Casual반말 — between close friends

Polite해요체 — standard politeness

Formal합쇼체 — very formal

	Casual	Polite	Formal
Present	—	—	에 통달해 있다 e tongdalhae itda is proficient in
Past	—	—	에 통달해 있었다 e tongdalhae isseotda was proficient in
Future	에 통달해 있을 거야 e tongdalhae isseul geoya will be proficient in	—	에 통달해 있을 것이다 e tongdalhae isseul geosida will be proficient in

Casual

Polite

Formal

Present

—

e tongdalhae itda

is proficient in

Past

—

e tongdalhae isseotda

was proficient in

Future

e tongdalhae isseul geoya

will be proficient in

—

e tongdalhae isseul geosida

will be proficient in

Present

Past

Future

그는 수학에 통달해 있다.
geuneun suhak-e tongdalhae itda.
He is proficient in mathematics.

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